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/vd (Disable Construction Displacements)
/vd supports incorrect behavior in an early version of Visual C++, and is no longer needed.
These options apply only to C++ code that uses virtual bases.
Visual C++ implements C++ construction displacement support in situations where virtual inheritance is used. Construction displacements solve the problem created when a virtual function, declared in a virtual base and overridden in a derived class, is called from a constructor during construction of a further derived class.
The problem is that the virtual function may be passed an incorrect this pointer as a result of discrepancies between the displacements to the virtual bases of a class and the displacements to its derived classes. The solution provides a single construction displacement adjustment, called a vtordisp field, for each virtual base of a class.
By default, vtordisp fields are introduced whenever the code defines user-defined constructors and destructors and also overrides virtual functions of virtual bases.
These options affect entire source files. Use vtordisp to suppress and then re-enable vtordisp fields on a class-by-class basis.
To set this compiler option in the Visual Studio development environment
Open the project's Property Pages dialog box. For details, see How to: Open Project Property Pages.
Click the C/C++ folder.
Click the Command Line property page.
Type the compiler option in the Additional Options box.
To set this compiler option programmatically